By failing to complete regeneration of tissue equal cells, the damaged part is replaced by connective tissue, the body produces a larger amount of the protein collagen, as part of the process to heal.
Over a period of about three months or longer, new collagen continues to increase and the scar feeds via blood vessels. With that scar grow gets the red color.
Then part of the collagen breaks down and the supply of blood decreases, so the scar slowly shrinking, it becomes softer, smoother and fainter.
Unfortunately, there’s no one in the world who does not scar. But luckily, there is an excellent home remedy that reduces them, fade and almost disappear.